Super Expat is right
Qataris who are Christian:
Sebastian Soria
Fabio Cesar
Marconi Costa and another one.

Any others who converted would have to keep it 'hush hush'

I went to a church in Shiraz and spent the afternoon listening to stories about Iranian Christians...very interesting as they do get the death penalty for apostacy.

Anyway how many Qataris are Shi'ite and how many Sunni?